Compressor



s. N. SOTER COMPRESSOR Fiiea Oct. 8, 1930 2 Sh eets-Sheet 1 Illl] I gmznlioz 3% F E. &%

Patented Aug. 22, 1933 UNITED STATES PATENT OFFICE COMPRESSOR Samuel N. Soter, Salt Lake City, Utah, assignor of sixty per cent to Louis N. Strike, Salt Lake City, Utah. Application October 8, 1930. Serial No. 487,142

3 Claims. (Cl. 23052) My invention relates to compressors and has for its object to provide a new and efficient suction actuated compressor which will build up sufficient air pressure to provide air storage in a tank for use in operating air brakes, pumping tires or operating pneumatic jacks.

A further object is to provide a double acting compressor which will pump air into the storage tank with each stroke of the piston in each direction. 7

' A still further object is to provide a positive acting compressor which will have the valves so constructed as to provide an assembly which will always operate, which will never clog from foreign material, and which will compress the desired amount of air for automotive purposes.

These objects I accomplish with the device illustrated in the accompanying drawings in which similar numerals and letters of reference 2 indicate like parts throughout the several views and as described in the specification forming a part of this application and pointed out in the appended claims.

In the drawings in which I have shown the best and most preferred manner of building my invention Figure 1 is a side elevation of the device. Figure 2 is an end view thereof. Figure 3 is a section on line 3-3 of Figure 1. Figure 4 is a diametrical longitudinal section ofthe device. Figure 5 isa section on line 5-5 of Figure 4. Figure 6 is an enlarged view of the valve operating mechanism. Figure '7 is an enlarged view of the'poppet air valves used in the small pistons.

In the drawings I have shown the device as made of a cylindrical housing A, having the ends thereof closed by castings B and C. Each of the castings B and C are. provided with acentrally disposed cylinder on the outer face thereof of 41L small diameter, said cylinders being designatedias 1 and 2. Onto the end of each cylinder'I provide a cap 3 having stud bolts 4 to secure the cap to the end of the cylinder. Each cap is centrally bored at 6 to receive a stub shaft '7 carrying a plate valve 8. The plate valve is to close the end of the cylinder bore 9. Spiral springs 10 hold the plate normally seated on the end of the cylinder. The caps 3 have a portion cut away therefrom leaving a chamber 11 in which the. valve plates operate and a port 12 is bored down one side of each cylinder and through the plate to be joined to- I gether by a pipe 13 extending from within the inner face of one casting B to the inner face of the other casting -C. In the casting B I then H screw a connection plug 14 to which a lead line (not shown) connects the plug and the interior of the ports 12 and the pipe 13 with a storage tank. Within the cylindrical housing A, I then provide a double acting piston formed of a circular casting 15 having one side of the periphery removed with a ring 16 adapted to be secured in the step ,formed thereby to hold two packing rings 17- and 18 in place. The ring 1'7 'fits over the periphery of the casting 15 and the ring 18 fits around the periphery of the ring 16 and stud bolts 19 are passed through holes in the ring 16 to hold the ring and the two packing rings to the casting 15. The piston is then screwed onto a shaft or connecting rod 20. The connecting rod 20 is centrally bored at each end to receive a valve assembly and ports 21 and 22 connect the bore with the interior of the chamber formed within the housing A. The ends of the rod 20 are made of largerdiameter than the rest of the rod and act as pistons 23 and 24 operatingwithin the cylinders 1 and 2. The valve assemblies which are screwed into the ends of the rod are formed of a cylindrical housing 25 having an enlarged valve seat 26 formed in the ends thereof and having the inner small end threaded externally to screw into the bore of the rod. When the assembly is screwed into the rod a packing ring 27 is carried thereon and secured therearound by having one portion secured between the end of the rod and the enlarged portion of the assembly cylinder, 5 with the outer face adapted to contact the inner surface of the cylinder 1 or 2. A valve 28 is carried in the housing 25 adapted to normally close the seat 26 thereof and the valve is carried on a stem 29'which stem is'carried by brackets 30 and 31, formed in the housing 25 with ports 32 therethrough to allow passage of'air therearound and throughthe housing 25. The end of the valve stem 29 is perforated to receive a cotter pin 33 and a spring holding washer 34 is carried on the stem as inside the pin 33 with a spring 35 between said washer and.v the bracket 31, said spring to normally hold the valve 28 seated in the seat 26.

On one side of the casting B, I form a radial boss 3'? which boss has a central bore 38 thereinto,

.Valve seats 43 and 44 and 47-and 48 are formed on each side of the ports 41 and 42 and spaced 1 apart sets oftvalves 45 and 46 and 49 and 50 are provided to open one port at thesame time the other is closed. These valves are made in two sets one for the two ports through each casting B and C and are carried on a stem 51 which stem is extended through each casting B and C and through the pipe 39 extending out-beyond the end 'of each casting. The ports 41a and 42a are connected with the interior of the cylindrical housing A by a radial port 52 and a port 53 leading thereinto. A port 54 connects the bore 38 of the boss 37 with the interior of the housing A. The sets of valveson the stem 51 are spaced apart sumciently so that when the stem is shifted in one direction one of said ports will be closed by a valve and the other will be open, with this being true of both sets of ports through both castings B and C. The valve stem 51 is provided with spaced apart perforated guides 52 and 53 to pivot bars 59. The pivot bars 59 are formed within a cylinder 60 which cylinder is secured in the bore 39 by a set screw 61. Another throw lever 62, formed also of two spaced apart bars secured together by a web 64, is attached to the lever 56 by a throw spring 63 by securing the ends of the spring in the webs 64 and 65 formed between the bars of the lever 56 and the bars of the lever 62. The said lever 62 has the ends forked at 66 to flt onto the bottom side of the pivot bars 59. The

lower ends of the bars of the lever 62 are formed roimded to flt into a mill cut 6'! in a throw shaft 68'so that when the shaft is moved longitudinally the levers will also be moved. This shaft flts into a hole 69 in the casting 2B and a yoke '10 is secured on the outer free end of thesaid shaft adapted to engage the piston casting 15 to move it in one direction to throw the valves and with the shoulder '11- of the connecting rod 20. The shoulder 71 of the rod 20 is that shoulder which is made by the pistons 23 and 24 being of larger diameter than the rod 20.

Having thus described my invention; desire to secure by Letters Patent and claim:-

1. In a device of the class described the combination of a large cylinder, a small cylinder on each end thereof; a piston operable longitudinally in said large cylinder; a piston rod secured through said piston having the ends thereof extended into said small cylinders to act as pistons therein; a conduit connecting the ends of the small cylinders with each other and with a storage tank; valves to control the flow of fluid ton rod ends.

from said small cylinders to said tank and to prevent back flow of fluid therefrom; a slide bar on which said valves are carried, and a spring controlled trip valve actuated by the movement of the connecting rod moving said slide bar to connect either side of the piston "5f the large cylinder with the intake manifold of on engine.

2. In a device of the class described the combination of a cylinder having inlet and outlet ports, and a piston reciprocating therein; closure heads on said cylinder, said closure heads having formed integrally'therewith flanges extending beyond the periphery of the cylinder and elongated cylindrical compression chambers of equal diameters but smaller than the flrst mentioned cylinder; a piston rod passing through said piston and having its ends extended into the said cylindrical compression chambers to act as pistons therein; axially disposed spring valves housed in the ends of the pistonrod and intercommunicating means between these valves and the cylinder; valves in the ends of the compression chambers;

relief ports from the valves in the chamber ends through the closure heads to a common receptacle; valves seated on the closure heads and in communication with the cylinder; a valve rod connecting these latter valves for simultaneous cooperative action; a trigger spring housed in one of said closure heads and operatively connected to the said valve rod; a plunger socketed in said closure head one end of which is operr- -atively connected to the trigger spring and the other end thereof projecting within the cylinder and adapted to be acted upon by the piston and one of the piston rod ends.

' 3. In a compressor of the character described having a large cylinder; a piston carrying a piston rod and reciprocating in said large cylinder; a closure head at each end of said large cylinder, each of said closure heads having formed thereon and integrally therewith small cylinders of equal diameters to receive the free ends of the piston rod, the ends of the piston rod being enlarged to act as pistons in said small cylinders and having housed axially therein spring valves which are in open communication with the large cylinder; valves in the ends of the small cylinders; outlet ports from said valves; and means connecting said outlet ports to a common receptacle; a ported valve housing outside of, but intercommunicating with said large cylinder by means of passages in the closure heads; a valve-carrying rod reciprocably mounted in said valve housing; and a spring toggle housed in one of the closure heads and having one of its prongs operatively connected to the valve rod; a plunger reciprocably mounted in the said closure head, one end of which is operatively connected to the other end of the spring toggle and the other end of which is adapted to be acted on for reciprocation alternately by the piston and one of the enlarged pis- SAM UEL N. SOTER. 

